Pattern for metal castings.



G. H. KRAMER. PATTERN FOR METAL GASTINGS. APPLICATION FILED we. a, 1911.

1,010,643. Patented Dec.5, 1911.

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PATTERN FOR METAL OASTINGS. urmoumx FILED me. a, 1911.

1,010,643. Patented Dec. 5, 1911.

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12 PH cu.,wAsHlNnToN GEORGE H. KRAMER, OF DAYTON,.OI-IIO.

PATTERN FOR METAL CASTINGS.

Specification of Letters Patent.

. Patented Dec. 5, 1911.

A -Application filed August 3, 1911. Serial No. 642,149.

To all whom it may concern:

Be it known that I, GEORGE H. KRAMER, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvements in Patterns for MetalCastings; and I do declare the following to be a full, clear,.and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters and figures ofreference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in patterns forforming the mold of elongated cylindrical members such as sash weights.Heretofore the method of casting such weights 'and other members whichare required to be turned out of the foundry in great quantities, hasbeen slow and tedious'as well as hard on the molder, and the experienceof foundrymen has been that it is difficult to get workmen to do thisparticular kind of foundry work, owing to its laborious and tryingcharacter; and further, it has been difficult to obtain the mostdesirable castings under the method heretofore in use in the foundry.Owing to these impediments in the way of producing such character ofcastings, it is the object of the present inventionto provide a new andimproved form of pattern so that a small or large number of suchpatterns may be used together in preparing the mold and'by the use ofwhich the work is greatly facilitated so that the cost of production isreduced, and the work of producing is rendered far less laborious on themolder. The number of patterns whether it be large or small may beremoved from the sand in a single operation, without endangering theformation of the mold. The individual patterns and the manner of themounting are such as to altogether remove the possibility of injuringthe mold.

A particular description of the invention will now be given inconnection with the accompanying drawings, of which- Figure 1 is a sideelevation of the assem is a bottom plan view of one edge of the moldwithin the cope portion of the flask;

Fig.4 is a side elevation of the pattern, the

same being shown partially lifted from the mold; Fig. 5 is a sectionthrough the cope on the line a.a of Fig. 3; Fig. 6 is a longitudinal,vertical sectional view through one of the individual patterns; Fig. 7is a similar view showing a modified form thereof;

and Fig. 8 is a view partly in section, of the product or casting.

Referring more particularly to said drawings, 1 designates a board whichconstitutes the base of the assemblage of individual patterns, and toone side of which is attached a plate 2. Mounted on'the plate 2 is aplurality of these individual patterns which are employed for castingwindow sash weights. The individual patterns are all similar as to theirparts, and the manner of supporting them on the board 1 so that they mayhave some movement in all directions out of a true perpendicularposition. By reason of their looseness or freedom of movement, all ofthe individual patterns assume relatively perpendicular positionswhenplaced in position in the flask, and in drawing them from the sandin a body each individual pattern yields in any direction to anyirregular resistance in drawing them from the sand. A description of oneof said individual patterns will suflice for all. Eachv of said patternsconsists of a cylindrical member or tube 3 of a length or diameter toprovide the necessary sash weight 30, as shown in Fig; 8; Said tubularpart'is closed at oneend by a solid end 3 1 the end which occupies thelowermost position in the flask.

The other or upper end of said tube orpattern may be open as shown inFig. 7, or partially closed as shown in Fig. 6, by inserting a ring 12therein. As shown in the latter figure of the drawing, an apertured plug9 is placed therein near the closed end,

and is secured in such position by a pin 9' or otherwise. Theportion ofsaid stem im mediately adjacent to the conical end is reduced as at 6 toenable said end to enter the aperture 8. The stem4 at its upper end isrigidly secured to the plate 2, by means of a nut 5, and surroundingsaid stem at a suit able point below said plate is a rigid collar 10having an upper tapered surface 11 which engages the lower end of thering 12. The pattern 3 is thus suspended from the shoulder 11 and isfree to have the necessary slight movement. In Fig. 7 the apertured plug16 is of slightly different construction, having the aperture entirelythrough it.

The end 15 of the stem 4 projects through said aperture and is fittedwith a nut 17 which performs the function of the shoulder 11 in Fig. 6.It is obvious that other means may be provided for supporting thepatterns 3 in a position to allow some necessary movement thereof inmanipulating the assemblage of patterns and for withdrawing them fromthe sand in a body. hen the patterns are in the position shown in Fig.1, where the drag is ready to receive the sand, the ends 6 of the stems4. lie within the apertures 8, and the lower ends of the in dividualpatterns are held in position by a stripping plate 13, hereinafterreferred to; consequently the individual patterns 3 will be preventedfrom moving sidewise when the sand is being packed and the mold is beingformed. When the pattern as a whole is reversed to the position shown inFigs. 4 and 6, and is being extracted from the sand, the individualpatterns recede from the board 2, and are carried by the collars 10which are in engagement with the annular members 12. In this positionthe ends 6 are withdrawn from the apertures 8 and it will be seen thatthe individual patterns may have a lateral movement to accommodatethemselves to the mold when being withdrawn fromthe sand. When thepattern as a whole is reversed to the position shown in Fig. 1, theconical ends 7 guide the ends 6 into the apertures 8.

In the construction shown in Fig. 7, the end of the stem 4, secured tothe plate 2 by a nut 5 is provided with a conical portion 14 and areduced portion 15 before referred to. The said conical portion isadapted to engage the edge of an annular member 16 secured to theindividual pattern 3 at an intermediate point on the interior thereof.When the pattern as a whole is in an inverted position from that shownin Fig. 7, the lower end of each individual pattern is held against sidemovement by the stripping plate 13, hereinbefore referred to andhereinafter more fully described, while the upper portion is held inrigid position by the conical portion 14 engaging the annular member 16.When the pattern is inverted to be withdrawn from the sand, the individual patterns assume the positions shown in Fig. 7, and each iscarried by the nut 17 which is in engagement with the annular member 16.It will be seen from Fig. 7, that each individual pattern in thisconstruction is capable of a lateral movement to accommodate itself tothe impression in the sand in the same manner as the construction shownin Fig. 6.

The pattern as a whole may consist of any number of individual patterns3 which may be arranged in any convenient manner on the plate 2.

As shown in Fig. 1, the drag 18, which receives the sand to form themold, surrounds the patterns 3. The sand may be packed by any of themeans known to the molders art. After the mold within the drag has beenformed, a pallet 18 is placed on top of the drag and the assembledpattern and the drag are inverted to the position shown in Fig. 4, andasid pattern withdrawn from the sand. To permit said pattern and drag tobe easily inverted, and the pattern to be withdrawn from the sand, thebase-board 1 is provided with standards 19 on the outer ends ofextensions 20, and buttons 21 adapted to be engaged by hooks or bails 22which may be attached to a suitable elevating device (not shown). Thebut-tons 21 are approximately in alinement with the center of gravity ofthe mold, which allows the mold to be easily inverted.

To prevent the sand on the upper side of the mold becoming damaged whenthe pattern is withdrawn, the stripping plate 13 heretofore referred to,is provided. hen the pattern as a whole is withdrawn, the said plate 13remains on the drag, being held thereon by gravity or any other wellknown means, and thus prevents the sand becoming broken along the upperface of the mold. When the said pattern is completely withdrawn, saidstripping plate 13 is removed by standards 23 attached to the baseboard1 and provided with heads 24. The said standards 23 extend throughopenings in the stripping plate, and the heads 24 engage said strlppingplate when the pattern is elevated above the mold.

The mold may be formed by any suitable form of pattern, and is adaptedto form an eye 27 through which the sash rope passes, as will be seenfrom Fig. 5. The completed sash-weight 30 is shown in Fig. 8, where itis shown to be provided with a recess 31 which receives the knot of thesash rope. This recess is formed by wedgeshaped metal chills 32 whichare placed in the imprints formed by prints 33 attached to the strippingplate 13. When the mold is poured, the molten metal will form itselfaround the chills, which, owing to their wedge shape, may be driven fromthe casting after it is taken from the sand.

The flat end surfaces of each of the heads 3 11 of the individualpatterns have a raised figure or figures indicating the weight of eachcasting as taken out of the sand. Heretofore it has been the practice tocast such figures on the side of the sash weight, which was difficult todo successfully by the old method of casting such parts.

To provide a passageway for the molten metal, a vertical gate 34 isattached to the plate 2. The said gate 34 is connected with the variousindividual patterns 3 by a horizontal gate 35 and gates 36 which passthrough openings 37 in the individual patlar pattern member is looselysupported so that it may be free to assume a perpendicular position aswell as positions out of a perpendicular position while beingmanipulated, substantially as specified.

2. In a pattern for metal castings, the combination with a base board,of a plurality of patterns each consisting of a tubular member, and arigid member projected from the base board into said tubular member, andcooperating means on the rigid member and on the tubular pattern memberwhereby said pattern member is loosely suspended on said rigid memberand is free to assume a perpendicular position or deflect from suchperpendicular position while the pattern as a whole is beingmanipulated, substantially as specified.

3. In a pattern for metal castings, the

combination with a base board, of a plurality of elongatedpatternsadapted to be assembled in parallel relation on said base board,each of said individual patterns consisting of a tubular form closed atone end and open at the other, a swivel piece fixed on the interior ofsaid tubular form, and a stem rigidly secured to said base plate andhaving means thereon adapted to cooperate with the swivel piece on theinterior of the tubular form in providing a loose support for saidtubular form, substantially as specified.

4. A pattern for casting window sash weights, consisting of a tubularform closed at one end and open at the other, an aper tured plug fixedon the interior thereof, a rigid stem projected into said tubular formand having a part thereon engaging said apertur'ed plug and forming apivot upon which said tubular member is supported, substantially as andfor the purposes specified.

In testimony whereof I afiix my signa-f Witnesses:

MATTHEW SIEBLER, E. F. LOGES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

